Finding the Fourth Proportional to 1,863.30, 2,571.93 and 1,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.30 : 2,571.93 = 1,200.15 : x
2. Step 2: Convert to fraction form
   1,863.30/2,571.93 = 1,200.15/x
3. Step 3: Cross multiply
   1,863.30x = 2,571.93 × 1,200.15
4. Step 4: Simplify right side
   1,863.30x = 3,086,708.22
5. Step 5: Solve for x
   x = 3,086,708.22/1,863.30
6. Step 6: Final answer
   x = 1,656.58